Alexander Aubert
Encyclopedia
Alexander Aubert FRS, was an eminent English amateur astronomer and businessman.

Life

He was born at Austin Friars, London, 11 May 1730. The appearance of the Great Comet of 1744
Great Comet of 1744
The Great Comet of 1744, whose official designation is C/1743 X1, and which is also known as Comet de Chéseaux or Comet Klinkenberg-Chéseaux, was a spectacular comet that was observed during 1743 and 1744...

 gave him, then a schoolboy at Geneva, a permanent bias towards astronomy; he diligently prepared, however, for a mercantile career in counting-houses at Geneva, Leghorn, and Genoa, and visited Rome in the jubilee year (1750)
Jubilee (Christian)
The concept of the Jubilee is a special year of remission of sins and universal pardon. In the Biblical Book of Leviticus, a Jubilee year is mentioned to occur every fifty years, in which slaves and prisoners would be freed, debts would be forgiven and the mercies of God would be particularly...

. Returning to London in 1751, he was in the following year taken into partnership by his father. In 1753 he became a director, and some years later governor, of the London Assurance Company. He was elected a fellow of the Royal Society
Royal Society
The Royal Society of London for Improving Natural Knowledge, known simply as the Royal Society, is a learned society for science, and is possibly the oldest such society in existence. Founded in November 1660, it was granted a Royal Charter by King Charles II as the "Royal Society of London"...

 in 1772, and of the Society of Antiquaries
Society of Antiquaries of London
The Society of Antiquaries of London is a learned society "charged by its Royal Charter of 1751 with 'the encouragement, advancement and furtherance of the study and knowledge of the antiquities and history of this and other countries'." It is based at Burlington House, Piccadilly, London , and is...

 in 1784.

In 1793 he received a diploma of admission to the St. Petersburg Academy of Sciences. He observed the transit of Venus
Transit of Venus
A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and Earth, becoming visible against the solar disk. During a transit, Venus can be seen from Earth as a small black disk moving across the face of the Sun...

 of 3 June 1769 at Austin Friars, and that of Mercury, 4 May 1786 at an observatory built by him at Loampit Hill, near Deptford
Deptford
Deptford is a district of south London, England, located on the south bank of the River Thames. It is named after a ford of the River Ravensbourne, and from the mid 16th century to the late 19th was home to Deptford Dockyard, the first of the Royal Navy Dockyards.Deptford and the docks are...

, and furnished
with the best instruments by Short, Bird
John Bird (astronomer)
John Bird , the great mathematical instrument maker, was born at Bishop Auckland. He worked in London for Jeremiah Sisson, and by 1745 he had his own business in the Strand. Bird was commissioned to make a brass quadrant 8 feet across for the Royal Observatory at Greenwich, where it is still...

, Ramsden
Jesse Ramsden
Jesse Ramsden FRSE was an English astronomical and scientific instrument maker.Ramsden was born at Salterhebble, Halifax, West Riding of Yorkshire, England. After serving his apprenticeship with a cloth-worker in Halifax, he went in 1755 to London, where in 1758 he was apprenticed to a...

, and Dollond
John Dollond
John Dollond was an English optician, known for his successful optics business and his patenting and commercialization of achromatic doublets.-Biography:...

. Except that of Count Brühl
Heinrich von Brühl
Heinrich, count von Brühl , was a German statesman at the court of Saxony and the Polish–Lithuanian Commonwealth...

, it was at that period the only well-equipped private establishment of the kind in England. In 1788 he purchased Highbury
Highbury
- Early Highbury :The area now known as Islington was part of the larger manor of Tolentone, which is mentioned in the Domesday Book. Tolentone was owned by Ranulf brother of Ilger and included all the areas north and east of Canonbury and Holloway Road. The manor house was situated by what is now...

 House, Islington
Islington
Islington is a neighbourhood in Greater London, England and forms the central district of the London Borough of Islington. It is a district of Inner London, spanning from Islington High Street to Highbury Fields, encompassing the area around the busy Upper Street...

, for 6,000 guineas, and erected on the grounds, with the assistance of his friend John Smeaton
John Smeaton
John Smeaton, FRS, was an English civil engineer responsible for the design of bridges, canals, harbours and lighthouses. He was also a capable mechanical engineer and an eminent physicist...

, the celebrated engineer, a new observatory on improved plans of his own.

His mechanical knowledge caused him to be appointed chairman of the trustees for the completion of Ramsgate harbour, and his energy contributed materially to the ultimate success of Smeaton's designs. In 1792 Aubert headed a society for the suppression of sedition, and in 1797 he organised, and was appointed lieutenant-colonel of, the 'Loyal Islington Volunteers.' While staying in the house of Mr. John Lloyd, of Wygfair, St. Asaph, he was struck with apoplexy
Apoplexy
Apoplexy is a medical term, which can be used to describe 'bleeding' in a stroke . Without further specification, it is rather outdated in use. Today it is used only for specific conditions, such as pituitary apoplexy and ovarian apoplexy. In common speech, it is used non-medically to mean a state...

, and died 19 October 1805, at the age of 75, highly esteemed both in scientific and commercial circles, and widely popular, owing to his genial manners and unstinted hospitality. His valuable astronomical library and instruments were sold and dispersed after his death. Amongst the latter were a Dollond 46-inch achromatic
Achromatic lens
An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths into focus in the same plane....

, aperture 3¾ inches, and the one Cassegrain reflector
Cassegrain reflector
The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas....

 constructed by Short, of 24 inches focus and 6 aperture, known among opticians as 'Short's Dumpy.' Both had been originally made for Topham Beauclerk
Topham Beauclerk
Topham Beauclerk was a celebrated wit and the only son of Lord Sidney Beauclerk; he was the great-grandson of King Charles II. He was a friend of Dr...

.

Works

Two slight papers by Aubert appeared in the Philosophical Transactions of the Royal Society
Philosophical Transactions of the Royal Society
The Philosophical Transactions of the Royal Society is a scientific journal published by the Royal Society of London. It was established in 1665, making it the first journal in the world exclusively devoted to science, and it has remained in continuous publication ever since, making it the world's...

:
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK